Toolholder



Dec. 18, 1951 GAMER 2,579,082

ITQOLHOLDER Filed Feb. 9, 1950 2 SHEETSSHEET 1 INVENTOR. F055??- KEANE/eR. KRAM ER TOOLI-IOLDER Dec. 18, 1951 2 Sl-IEETSSHEET 2 Filed Feb. 9,1950 W. 5* INVENTOR iiasser Km MER Patented Dec. 18, 19 51 UNITED STATES7 .OFFICE QFD T r Robert Kramer, Carpentersville, 111.. ApplicationFebruary 9, 199;s' eriar No. 143,182

My invention relates to improvements in tool holders for milling andboring machines. My invention relates more particularly to improvementsin the construction of a combined chuck and arbor for tool holders and acollet holder interchangeable therein with standard taper spindles atpresent on the market.

Because of the loss of time involved in changing from one tool toanother efforts have been made in the past to set standards for millingmachine spindles. Spindle tapers, spindle nose diameters, drive keys,and bolt circle diameters have been standardized providing completeuniformity on modern milling machines. 1 This standardization permitsinterchangeability of arbors and face milling cutters. For example, thesize taper is uniform and two ofthe standards most frequently used aretaper spindles designated as No. 40 and No. 50 which are-similar in thatthe standard 3%; inch per foot taper which allows instant release of thearbor is employed. However, the No. 40 spindle and the No. 50 spindleare different in that collet holders or arbors adapted to beheld by onewill not fit the other, thus causing loss of time when it becomesnecessary to change from a No. 40 spindle to a No. 50.

An object of my invention is to provide an improved combined chuck andarbor capableof holding my improved special quick release tool holdershown herein.

A further object of the invention is to provide a special quick releasetool holder capable of fitting either my improved chuck and arbor or astandard No. 40 spindle, and being interchange able.

A further object of the invention is the provision of an improvedcombined chuck and arbor for use with milling machines which includes atool holder instantly releasable from the arbor so that the timerequired for changing from one tool to another is greatly minimized.

A further object of the invention is to provide an'improved combinedchuck andarbor having locking means for the tool holder associatedtherewith, said locking means capable of audible signal when said meansare unlocked to permit re.- 7

with, or in a standard No. 40 spindle.

Other objects and advantages will be more ap- 4 Claims. ((31. 279 1os)parent from the following description wherein reference is had to theaccompanying drawings, upon which I QFig. 1 is a cross- -se'ctional viewthrough the fragment of a milling machine showing my improved toolholder in operative position therein holding a milling cutter;

.Figi 2 is a front elevational view thereof with portions broken insections to more clearly show other parts;

Fig. 3 is across-sectional view of the locking nut;

Fig. 4 is a front elevational view of the same; Fig. 5 is a sideelevational view of the combined chuck and arbor which I employ;

Fig. 6 is a front view thereof 1 Fig. 7 is a side elevational view ofthe removable and replaceable tool holder shown in the assembly of Fig.1; I

Figf8 is an end viewof the same looking from the left of Fig. 7; and vFig; 9 is a fragmentary cross-sectional view thereof taken on the line99 of Fig. 7.

In the embodiment of the invention which I have chosen to illustrate anddescribe the same, I have shown the usual type of No. milling machinetapered spindle I2 through which the draw-in bolt [4 may be extendedto'the tapped axial'bore I6 of the combined chuck and arbor I8 that ismounted in the bore 20 of the tapered spindle l2.

The combined chuck and arbor l8 may be provided with a circular flange22 having the usual aligned slots 24 to receive the usual drivingmembers located'on the front of the tapered spindle 12.

The forward end of the combined chuck and arbor may have a reducedscrew-threaded portion 26 having a pair'of forwardly extending lugs 28thereon for a purpose which will be hereinafter apparent.

The locking collar 30 shown in Figs. 3 and 4 is provided with a tap 32to screw-threadedly engage the portion 26 and is further provided with areduced face opening 34 which has a pair of inwardlyext'ending' lugportions 36.

The combined chuck and arbor l'8 has a tapered axial bore 38 to receivethe tool holder. 40 formed with a tapered shank 42, a reducedcylindrical end 44 having a screwthreaded axial bore 46 therein, and anelongated knock-out pin opening 48. The tool holder also has acomparatively long tapered bore 50 within which operating tools such asmilling cutters, boring tools, etc., may be mounted for operation.

The forward'end of the tool holder 40 is provided with a circular ledge52, having a reduced circular extension 54 and an enlarged collarportion 56 forward from the same. The circular ledge 52 has a pair oflateral slots 58 therein, which in inserting the tool holder into thecombined chuck and bore, pass over the extensions 28 on thescrew-threaded portion 26 of the chuck and bore to receive them in adriving relation.

In this position the collar 30 which has a pair of lug portions 35screw-threadedly mounted on the portion 26 'and as it isscrewedforwardto tighten the tool holder in position and is rotateduntil in a locking position that moves past the spring pressed plunger60 to the position shown:

in Fig. 2, the tool holder will be locked in operative position. In thisposition allof: theipantsitoi the assembly are as shown in, Big lending.v 2., and the operation of the milling butter or other tool maybe carried out.

In order to release the; tool holder 40 so that tqmay be emoved: nd,anoth su s itu ed, he oc n ol 3D, s.v ro ated;coun rlo kw se until thelugs 36 are aligned with theslots. 5 8 in thetool: holder 4i],atwhichntime the spring pre s inflr i the acle' fa lail e 1 wi l el citin o. he sh low cl r t 6. in} h t ceaois ac n collar 38', thus bothaudibly} and loyfeel,ir diaatens e lea ed po it on. of; the; too ho d ipm h a ove and fore o descriptio it can be seen that the changing from;oneitoolj holder, to ,anothercan be practically, instantaneous'lyefiected, and in the case of vertical spindlli operation it is not,nepeSSary-to see the condition f h o ineol ar, order onetermi elockingor unlockingppsition; rather the, Samecan be felt or heard, f

Dueto the siz e of thetaper as v previously menti0n d;. n he ombin dhuck, andarb iand. its, similaritytothat of the No. 40, spindle,, thesam e. special tool holder may. be remployedrin, .a-Nos 40 2. Thecombination for the tapered spindle of a milling machine including acombined chuck and arbor having andaxial bore to receive the draw-in rodof the milling machine and a tapered shank complementary to the bore ofsaid milling machine spindle, a lateral flange at'the forward end of thesame, a reduced screw-threaded portion extending forwardly therefrom, apair of screw-threaded lugs extending forwardly therefrom, a pair? of.screw threadedi lugs; extending forward from said screw threadedportion, a tool holder capable of positioning" in said combined chuckand arbor, said tool holder having a forwaaid lateral flange, a pair ofslots therein adapted to fit over said lugs, and a locking collar forhel'ding-thesam'e in operative position, said tool holderaremovableupona partial rotation-of said locking collar. 7

33 The combination for the tapered spindle of a milling machineincluding a combined chuck and; arbOlf; hay-ingan axial; bore; to;receive the draw-in rod, of;the milling rnachinegand ai-tap ered shank;complementaryto; the;bore -oi.- said: milling machine spindle,- a;lateral flange at the forward end: of thesame,a1reducedvscrew-threadedsportion; extending; forwardly therefrom, apair; of radially opposed; screw-threaded: lugs extending forwardpfrom;said; screw-threaded. portion; a tapered: borein said combined; ohucleandiarbor, atopl-v holder capable of-beingpcsitioned therein; saidtoolholder: having; a, forward lateralflange, apair ofislots; thereinadapted-to fitofv'er, the-end of .saidcomloined:chuckand-arborlugsp andalock-- ing collar for hgleling the same in operativez posl tion;

taper spindle, thus affording anuickphange from l. The combination forthe tapered spindle -oi,

imm g, h n n ludi a, a ombined ch and arbor having an axial bore to,receiye, the, draw, -in rodjjof th milling ma cl1inc anda tapered shankcomplementary; to thelbore, ofsaidjmillin'g,

machine spindle, a lateral flange at ,thefbtliard endiof e m r d e tlcrewhreededinor: tion extending forwardly thereiromga pair, of ewv reaed lu s extendingforw rdIromsaid. screw-threaded portion, a tapered bOreinHSaiQ,

combined chuck and arbor, a tool holder capable i ir e p tio ed th eliholde g arme a orw rd lateralfianea. ap rioiislo i heree in adapted tfi 'OY the. nd fo 's id combined chuck and arbor ,lugs',, a lockingcollar for hplding; e am o n. li- Operative esiti' m,seid:l0ck ne ol r-prable f.; .ee n ,said t orhtolder ppn, a a t al t n, e ame. and n 4 u ibe,

i ras c th rew h; en -o e le u on a partial rotation of; 'jsaidcollar.

4-. The combinaticngfor the-;-tapered;spindle0i 'amilling;machinerincluding; a; combined chuck andq irbor having; an axial-; here;to. I'EGGi'TvGrrlZhG: draw-inrmdoithe milling; .maclnneand'aitaperedshank complementaryto, the borepfsaidj milling; mac he-spindle,-v alateral fiangewat; the;-forward REFEBENCES -CITED The: following.references are ofrecord the filfia of this patent VUNITEDFSTATESFPATENIS Number Name V, a Date V D czha gzl zs 802,-25l7-rTroxel: Oet.;.l7}l905r 13 41,338 Palmeren Oct; 15,5 191 2.- 1,15fl-,,513,, Dan-ipie'r.., Oct. 19,: 19:15. 1,618,998 Redinger Mar=:.l,=19 217, 1,934,415. Fisher, Novz-n'h 1933 2,039,855; Stone, -4 Ma.,5,-,1936l

